From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f97.google.com (mail-qv1-f97.google.com [209.85.219.97]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 574DE23D7CF for ; Thu, 12 Feb 2026 21:33:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.97 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770932005; cv=none; b=lhAoHluhLBXEo+imxtYB2dg3UZq5XGH6dLJ4/Car5qh/mGr9ggRS54N3nTKuzl7oBHxoZ21M+cH+mSc+u265nYM+vxlaoO4LZ1tBQBPkdctoImvXaLsG17mE/rZ8ZoVIop71gfyobKr2mhTShdWNU9+rYjj/ddxgXY/e2BWCpXo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770932005; c=relaxed/simple; bh=pmI3XcFAg1N01J5SE+zjIlDgn7uxepWbL2S18tNqWUE=; h=From:Cc:Subject:To:Date:Message-Id; b=nR6+7Arivc6fdVkApCCmTRiI65J5SKd8DuPI58hqZ6wjrnO3z6mahJl0lIVGW35o3/rvHNaPq0iWbN5ZEGaX9ABKPAdtgNfpBf/jrj4ezCCCkgq8m5KwN4uj/K15hqfywKwAHxlFT7J3TCt5RJ8YeQwM3FBGuGTMvlZ8cwloJQQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=windowsforum.com; arc=none smtp.client-ip=209.85.219.97 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=windowsforum.com Received: by mail-qv1-f97.google.com with SMTP id 6a1803df08f44-894674a4c4aso5251036d6.3 for ; Thu, 12 Feb 2026 13:33:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770932003; x=1771536803; h=message-id:date:user-agent:to:subject:cc:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=pmI3XcFAg1N01J5SE+zjIlDgn7uxepWbL2S18tNqWUE=; b=U+KQJOr/dPv8OXrr4STxKT/IxumOcfa7Us4najlRLQ/eO8bA6p8bYKydnIen129SB4 F1AzkMiu/EvQBxsmz3b7zQT5bO08bXWPPqXxDCMApPIoztRsjgY4iRCNh3KqPqc0+SSW yAkLIfJ4Emnt890OViDj44i6zbASz05ycN6v7CP6BloRB3ntHB6HwnZGpbz9WchSH1rq +FxT/MY9L9xKbInYt6IH7iVGgEfPMX/lwKiRCwBrgPGZTV5jqDAVp9OwMEUy/T3JCRXu /FlrSYV23O+hnTwUNqgK6FPa4OiWIHgGtiXtXqQTyrF7zVKTl+A457TuSoyke+gPGr/4 FDMQ== X-Forwarded-Encrypted: i=1; AJvYcCV3aRYrFH6APt7zQ6imIQZWhZztoAFFZz+6WrAYT1UXxjTplvcuh8dwTpJ08wY9RSPGmdpKeYIDxs9OKgQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwfXD0S3pfE6lrg03dxJ//fzXEqG/4QGmFXcy4qzaB9W+l4dyDI +2c1JTGfoA/i8lBhuGEhfH+OJhJQeLBsTPzoLxA1olH5U0S802muxaYBAb4vp82zXMG1uR4fUOQ trMHLBQTAki5nG/bxiV8zE3iZYwh9Mf7RRHEM X-Gm-Gg: AZuq6aIrUDgLWAMhgqDsnlFTMaKngrBtVq6hhWn7bdcheagxG8lGmZ1lQTPLRZZDvLG jH6Bwmdc/941Ep4CG/YUGGMGp0B7YNUxftUN5DwN1XN8qh/5zrPFEUu37Uz0/7hSphjNO3P5kLZ 1WsBA4nnVNOJbyuvtVjw6K/l9cl01s5VIp/N1d0izGbHasHNpgwO5FnhDBruKRS3HxeSdLE7Xvx 3L/W4AxgQD4+cKya8M9QtBaADl3tOagh/wFn4ky35s9N4kAhu2iYFsyeyZJ29qrKEYGkdMU7l2y e6Ei0ULoOXYxclrCzjcGHiGRa314JROCp2a+31tHl+uMB6KJdPSkIqK8s/hx0vUWtza4NSpTWtA MhtS8th6LTaj02AYL7PrVrezrhWsGfN6DI1kwbNyw94v7wgpjTg== X-Received: by 2002:a05:6214:3d89:b0:896:a692:cab9 with SMTP id 6a1803df08f44-897347d1588mr8670396d6.39.1770932003442; Thu, 12 Feb 2026 13:33:23 -0800 (PST) Received: from windowsforum.com (116.9.196.104.bc.googleusercontent.com. [104.196.9.116]) by smtp-relay.gmail.com with ESMTPS id 6a1803df08f44-8971cd73992sm7714596d6.26.2026.02.12.13.33.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Feb 2026 13:33:23 -0800 (PST) X-Relaying-Domain: windowsforum.com Received: by windowsforum.com (Postfix, from userid 0) id 40E502A1C1D; Thu, 12 Feb 2026 21:33:21 +0000 (UTC) From: Mike Fara Cc: ,,, Subject: Re: [BUG] sched_mm_cid_exit+0xe2: page fault on CID bitmap write with nopti on 6.19.0 To: User-Agent: mail (GNU Mailutils 3.20) Date: Thu, 12 Feb 2026 21:33:21 +0000 Message-Id: <20260212213321.40E502A1C1D@windowsforum.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hi Mathieu, Thanks for the quick response. Commit 1e83ccd5921a looks correct for our issue — the symptoms match exactly. The lock btr was hitting an out-of-bounds bit number from an unvalidated TRANSIT state. I've cherry-picked the patch onto 6.19.0 with CONFIG_SCHED_MM_CID=y and nopti still on the cmdline. Build is running now. Will report back with results after reboot and soak testing. Thanks, Mike Fara mjfara@gmail.com